condition mean min max 4 h after light 10.083108 9.53452 10.631696 8 h after light 8.957252 8.394557 9.519947 12 h after light 9.256200499999998 9.138912 9.373489 4 h after dark 9.3490675 9.324646 9.373489 8 h after dark 8.872852 8.446746 9.298958 12 h after dark 9.578584 9.578584 9.578584